Sliding vane pump



DE ;FoREsT c. HNMAN SLIDING VANE PUfsP Filed Dec. 15, 1947 Patented Jan. 3, 1950 UNITED STATES PATENT OFFICEl sLmNG VANE PUMP De Forest C. Inman, Clarkston, Mich. Application December 15, 19147, serial No. 791,815 1 claim. (c. 103-135) This invention relates to pumps of the sliding vane type.

An object of this invention is to provide a sliding vane pump embodying a rotor disposed accentrically in the pumping chamber with pairs of piston blades loosely carried by the rotor and engageable with the wall of the chamber to provide for the suction of fiuid at one side of the chamber and the pressure discharge of the fluid at the other side of the chamber.

Another object of this invention is to provide a sliding vane pump embodying parallel pairs of piston blades which are slidabiy carried by the rotor with each member of each pair independently movable relative to the other member of the same pair.

A further object of this invention is to provide a slidng vane pump embodying one or more pairs of piston blades slidabiy carried by the rotor, with the blades formed of ilbrous or composition material so as to reduce the wear on the wall of 'the pumping chamber.

To the foregoing objects, and others which may hereinafter more fully appear, the invention consists of the novel construction, combination and arrangement of parts, as will be more specifically referred to and illustrated in the accompanying drawings, but it is to be understood that changes, variations, and modifications may be resorted to which fall within the scope of the invention as claimed.

In the drawing:

Figure i is a plan view, partly broken awayv and in section, of a slidlng vane pump constructed according to an embodiment of this invention.

Figure 2 is a sectional view taken on'the line 2-2 of Figure 1.

Figure 3 is a plan view of the rotor.

Figure 4 is a detailed side elevation of one pair of the piston blades.

Referring to the drawing, the numeral lt designates generally a housing which is 'formed of a cylindrical wall ll and the wall i 2 formed integral with the wall I I. A removable end wall I: is secured by i'astening means it to the side wall or cylinder il. The housing Il also includes a base i! which is adapted to be iixedly secured to a suitable support. The side wall or cylinder il has extending therefrom an intake nipple it and an outlet nipple I'I disposed oppositeiy from and aligning with intake nipple il. A rotor, generally designated as ll, is rotatably mounted in the cylinder ii being eccentrically disposed so that the rotor II will be in substantially close contact with the lower side of the cylinder li asshowninli'ieure The rotor it includes a shaft il which rotatably extends through' a bushing 26 carried by the end wall ll and agland 2I provides eal for the shaft II. The rotor it is formed with apairofparallelslotsil withinwhlchtwopair of piston blades 23 are adapted to slidabiy engage. The blades 23 are of like construction and each includes, as shown in Figure 4, a pair of fiat blade members 25 and 26 which are formed with an obliquely disposed inner edge 27. The outer ends of the blade members 25 and 26 ;are

' curved or rounded as indicated at 28 and 26, re-

spectively, the curved portions 28 and 29 constituting the trailing portions of the blade memhers 25 and 26 by providing each blade structure from a pair of independently movable blade members 25 and 26, these blade members will centrifugally contact with the inner surface of the cylinder Il upon rapid rotation of the rotor it.

The blade members 25 and 26 are preferably formed of flbrous material such as pressed fiber or the like so that these blade members may, if desired, be impregnated with a lubricant and will not upon frictional engagement with the inner surface of the cylinder il unduly wear this inner surface.

In the use and operation of this pump the rotor la is rotated as shown in Figure 2 in counterclockwise direction so as to draw in fluid through the intake nipple I 6 and as the blades near the outlet nipple l'i the fiuid will be dischargedv through this nipple while at the same time the piston blades will slide endwise in the slots 22 of the rotor l8. The substantial point of contact between the rotor IB and the cylinder il will provide apartition so that the fluid will be forcibly discharged through the outlet nipple l'l.

I claim:

A sliding vane pump comprising a cylindrical housing, opposed intake and outlet members on said housing, an eccentric rotor rotatable in said housing, said rotor formed with a pair of spaced apart parallel slots extending transversely therethrough, a blade slidable in each of said slots, each of said blades including a pair of aligned blade sections, each of said blade sections having 'parallel side edges and an outer edge engageable with the inner wall of said housing, and an obliqu'e inner edge between said parallel edges confronting a spaced oblique inner edge on the aligned blade section.

DE FOREST C. INMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS u Number Name Date 963,690 Curtis July 5, 1910 2,834,763 Hawkins. Nov. 23, 1948 FOREIGN PATENTS 'o Number Country Date sam mance---- sept. 27, 1921 819,422 Germany Mar. 9, 1920 

